Tektronix 6517-RH User manual
Keithley Instruments
Model 6517-RH Humid ity Probe
1
28775 Aurora Road
Cleveland, Ohio 44139
1-800-833-9200
tek.com/keithley
Instructions
Description
The Model 6517-RH Humidity Probe is used with the Model 6517B Electrometer to measure the relative
humidity of the testing environment. Monitoring the relative humidity is vital to keeping environmental conditions
identical to compare specific measurement data or to study the effects of conditions on the material. The
6517-RH comes with a 3 m (10 ft) extension cable.
Figure 1: Model 6517-RH Humidity Probe
To use the probe:
1. Plug the mini-DIN end of the cable into the HUMIDITY connector on the rear panel of the Model 6517B.
2. Insert the probe end of the cable into the test chamber or area where the humidity is to be measured.
PA-403 Rev. D August 2022
Figure 2: CA-129-1 Extension Cable
*PPA-403D*
Model 6517-RH Humidity Probe Instructions
Specifications
Accuracy at 20°C: ±3% relative humidity
Operating temperature range: −10 °C to +60 °C
Operating humidity range: 0 to 100% relative humidity
Measuring range (for which accuracy is specified): 10 to 90% relative humidity
Stability: ±2% over 2 years
Temperature dependence: <±2% from −10 °C to +60 °C
Replaceable parts
The sensor element may be replaced by ordering Keithley part number PR-32. The PR-32 meets specifications
for two years. Sensor specifications need to be applied according to individual requirements for uncertainty
versus time. Each sensor is totally interchangeable with another, which means that the sensor can be replaced
in the field. Operation can be resumed without calibrating the instrument.
Disassembly in formation
The following figure shows an internal view of the membrane filter and mechanical housing section of the probe
where the sensor is located. To replace the old sensor, carefully remove it and insert the new PR-32 into the
unmarked openings.
Figure 3: Internal view of the membrane filter and mechanical housing
2 PA-403 Rev. D August 2022
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