=== API - /search (retrieval evidence) === status: 200 | sections returned: 3 score=1.0000 document_id=db8039d8-7204-416d-9af1-7c625be5b57c or nutrient-rich water are advised to shorten the interval between visits rather than to clean the sensing face themselves, because the inductive cell is easily damaged by an abrasive. ## Calibration Every instrument leaves the laboratory with a signed certificate recording the as-found and as-left bias at four reference points across the working range. The recommended recalibration interval for the Tolvan A3 is 22 months from the date of the last certificate. An instrument returned early because of a suspected drift is checked as found before anything is adjusted, so that the drift can be quantified rather than merely corrected. ## Firmware Firmware is updated during a service visit rather than over the telemetry link, because an interrupted update on a deployed instrument leaves it unreadable until it is recovered. A customer who declines a recommended update is asked to confirm in writing, and the confirmation is attached to the instrument record. --- score=0.6667 document_id=db8039d8-7204-416d-9af1-7c625be5b57c Extracted Text: # Tolvan A3 - product overview The Tolvan A3 is a conductivity and temperature sensor built for continuous deployment in estuarine and coastal water. It is the instrument most of our customers meet first, and most of the questions the service desk answers are about this one. ## What it measures The instrument reports conductivity, temperature and a derived practical salinity. Conductivity is measured with an inductive cell, which has no exposed electrodes to foul or to wear, and temperature with a thermistor mounted in the same flow path so that the two readings describe the same parcel of water. Pressure is not measured; where a depth record is needed, the instrument is paired with a separate pressure sensor on the same mooring. ## Where it is used Typical deployments are estuary monitoring for a regulator, intake monitoring for a water treatment works, and baseline surveys ahead of construction in a harbour. It is rated for continuous immersion to fifty metres. Deeper work uses the Tolvan C5, which shares the sensing arrangement in a pressure housing rated considerably deeper. ## How it is powered and read On a mooring, the instrument runs from an internal battery pack and logs to internal memory. On a cabled installation it is powered over the same cable that carries its data, and reports continuously to the Brannoc telemetry gateway, which forwards to the customer's own system. The two modes are configured at commissioning and are not switched in the field. ## Fouling and cleaning In estuarine water the practical limit on deployment is biological fouling rather than power or memory. An anti-fouling guard and a sacrificial anode are fitted at commissioning and replaced at each service visit. Customers in warm or nutrient-rich water are advised to shorten the interval between visits rather than to clean the sensing face themselves, because the inductive cell is easily damaged by an abrasive. --- score=0.5000 document_id=024a3b75-1900-4fdc-abe2-cee5137bcd17 Extracted Text: Fenwake Instruments Ltd Warranty Terms Service pack - warranty terms for the service desk 1. What is covered These are the warranty terms the service desk applies when a customer reports a failure. They apply to every new Tolvan A3 supplied by Fenwake Instruments Ltd, however it was ordered and wherever it is deployed. The warranty covers the instrument, its pressure housing, its connector and any cable supplied with it. It covers failure arising from a defect in materials or workmanship. Where a covered failure occurs, Fenwake repairs or exchanges the instrument at its own option and bears the cost of carriage in both directions. 2. The warranty period Every new Tolvan A3 carries a warranty of 36 months from the date the instrument is delivered. The period runs from delivery rather than from commissioning, and is not extended by a repair carried out under it. 2.1 Instruments repaired under warranty A repaired instrument carries the unexpired balance of the original period, or ninety days from the return of the repaired instrument, whichever ends later. 3. What is not covered (cid:127) Fouling, corrosion of sacrificial components, and wear of consumables such as anodes, guards and gland kits. (cid:127) Damage caused by a mooring failure, a vessel strike, a snagged cable or any other mechanical event outside the instrument. (cid:127) Damage caused by opening the housing outside a Fenwake workshop, or by breaking a calibration seal. (cid:127) Drift within the published specification. Drift is a calibration matter, not a defect. (cid:127) Any instrument whose serial number has been removed or altered. 4. Making a claim A claim is made through the service desk, quoting the serial number and the delivery note. The service desk raises a ticket, arranges return carriage and tells the customer within five working days whether the failure is covered. Where it is not covered, the customer is quoted for the repair before any work starts. --- === API - /chat (grounded-generation cross-check) === status: 200 answer: The recommended recalibration interval for the Tolvan A3 is **22 months from the date of the last calibration certificate**. top 3 of 27 sections (full content); rest = score only, full text for all in the attached evidence .txt score=1.0000 document_id=db8039d8-7204-416d-9af1-7c625be5b57c or nutrient-rich water are advised to shorten the interval between visits rather than to clean the sensing face themselves, because the inductive cell is easily damaged by an abrasive. ## Calibration Every instrument leaves the laboratory with a signed certificate recording the as-found and as-left bias at four reference points across the working range. The recommended recalibration interval for the Tolvan A3 is 22 months from the date of the last certificate. An instrument returned early because of a suspected drift is checked as found before anything is adjusted, so that the drift can be quantified rather than merely corrected. ## Firmware Firmware is updated during a service visit rather than over the telemetry link, because an interrupted update on a deployed instrument leaves it unreadable until it is recovered. A customer who declines a recommended update is asked to confirm in writing, and the confirmation is attached to the instrument record. score=0.6667 document_id=db8039d8-7204-416d-9af1-7c625be5b57c Extracted Text: # Tolvan A3 - product overview The Tolvan A3 is a conductivity and temperature sensor built for continuous deployment in estuarine and coastal water. It is the instrument most of our customers meet first, and most of the questions the service desk answers are about this one. ## What it measures The instrument reports conductivity, temperature and a derived practical salinity. Conductivity is measured with an inductive cell, which has no exposed electrodes to foul or to wear, and temperature with a thermistor mounted in the same flow path so that the two readings describe the same parcel of water. Pressure is not measured; where a depth record is needed, the instrument is paired with a separate pressure sensor on the same mooring. ## Where it is used Typical deployments are estuary monitoring for a regulator, intake monitoring for a water treatment works, and baseline surveys ahead of construction in a harbour. It is rated for continuous immersion to fifty metres. Deeper work uses the Tolvan C5, which shares the sensing arrangement in a pressure housing rated considerably deeper. ## How it is powered and read On a mooring, the instrument runs from an internal battery pack and logs to internal memory. On a cabled installation it is powered over the same cable that carries its data, and reports continuously to the Brannoc telemetry gateway, which forwards to the customer's own system. The two modes are configured at commissioning and are not switched in the field. ## Fouling and cleaning In estuarine water the practical limit on deployment is biological fouling rather than power or memory. An anti-fouling guard and a sacrificial anode are fitted at commissioning and replaced at each service visit. Customers in warm or nutrient-rich water are advised to shorten the interval between visits rather than to clean the sensing face themselves, because the inductive cell is easily damaged by an abrasive. score=0.5000 document_id=024a3b75-1900-4fdc-abe2-cee5137bcd17 Extracted Text: Fenwake Instruments Ltd Warranty Terms Service pack - warranty terms for the service desk 1. What is covered These are the warranty terms the service desk applies when a customer reports a failure. They apply to every new Tolvan A3 supplied by Fenwake Instruments Ltd, however it was ordered and wherever it is deployed. The warranty covers the instrument, its pressure housing, its connector and any cable supplied with it. It covers failure arising from a defect in materials or workmanship. Where a covered failure occurs, Fenwake repairs or exchanges the instrument at its own option and bears the cost of carriage in both directions. 2. The warranty period Every new Tolvan A3 carries a warranty of 36 months from the date the instrument is delivered. The period runs from delivery rather than from commissioning, and is not extended by a repair carried out under it. 2.1 Instruments repaired under warranty A repaired instrument carries the unexpired balance of the original period, or ninety days from the return of the repaired instrument, whichever ends later. 3. What is not covered (cid:127) Fouling, corrosion of sacrificial components, and wear of consumables such as anodes, guards and gland kits. (cid:127) Damage caused by a mooring failure, a vessel strike, a snagged cable or any other mechanical event outside the instrument. (cid:127) Damage caused by opening the housing outside a Fenwake workshop, or by breaking a calibration seal. (cid:127) Drift within the published specification. Drift is a calibration matter, not a defect. (cid:127) Any instrument whose serial number has been removed or altered. 4. Making a claim A claim is made through the service desk, quoting the serial number and the delivery note. The service desk raises a ticket, arranges return carriage and tells the customer within five working days whether the failure is covered. Where it is not covered, the customer is quoted for the repair before any work starts. remaining sections (score only): score=0.4000 document_id=89619c96-ea19-4a34-94ee-9dc193dcbdc0 score=0.3333 document_id=3521148f-e319-4db6-bb5b-b5024db6bc12 score=0.2679 document_id=88399604-1153-40ef-be66-f4da43a873a2 score=0.2159 document_id=883f27f0-81c3-4c46-90f8-b71f5d3695b6 score=0.1883 document_id=db8039d8-7204-416d-9af1-7c625be5b57c score=0.1699 document_id=7ca3a7b8-634b-4fb6-91b1-f4cde198aa86 score=0.1667 document_id=88399604-1153-40ef-be66-f4da43a873a2 score=0.1611 document_id=883f27f0-81c3-4c46-90f8-b71f5d3695b6 score=0.1526 document_id=88399604-1153-40ef-be66-f4da43a873a2 score=0.1484 document_id=88399604-1153-40ef-be66-f4da43a873a2 score=0.1333 document_id=024a3b75-1900-4fdc-abe2-cee5137bcd17 score=0.1279 document_id=89619c96-ea19-4a34-94ee-9dc193dcbdc0 score=0.1213 document_id=09c99644-e630-44a4-81f5-636ed80d942c score=0.1204 document_id=883f27f0-81c3-4c46-90f8-b71f5d3695b6 score=0.1154 document_id=024a3b75-1900-4fdc-abe2-cee5137bcd17 score=0.1121 document_id=88399604-1153-40ef-be66-f4da43a873a2 score=0.1114 document_id=88399604-1153-40ef-be66-f4da43a873a2 score=0.1111 document_id=883f27f0-81c3-4c46-90f8-b71f5d3695b6 score=0.1101 document_id=7ca3a7b8-634b-4fb6-91b1-f4cde198aa86 score=0.1003 document_id=89619c96-ea19-4a34-94ee-9dc193dcbdc0 score=0.0851 document_id=7ca3a7b8-634b-4fb6-91b1-f4cde198aa86 score=0.0819 document_id=09c99644-e630-44a4-81f5-636ed80d942c score=0.0817 document_id=09c99644-e630-44a4-81f5-636ed80d942c score=0.0714 document_id=09c99644-e630-44a4-81f5-636ed80d942c