Rj Calibration; Equipment Required; Environment - Isotech TTI 7 PLUS User Maintenance Manual/Handbook

RJ Calibration

The reference junction of both channel A and channel B should be calibrated. Select RJA, insert a Pt100 standard
thermometer in the 4mm negative (lower) input socket of channel A, and allow the temperature to stabilise; it is
necessary to use a sensor that fits securely into this socket. Once the temperature of the socket has stabilised, and a
steady temperature reading is obtained, enter the temperature into the instrument. The screen will now prompt
you to enter the block temperature. Confirm the value and press OK. Repeat this procedure for channel B, moving
the sensor to the negative input socket in channel B.
Once both channels have been calibrated you may exit the calibration menu with the QUIT key.

Equipment Required

1 Resistance Standard Type RS3/100 Value 100 Ohms
1 Resistance Standard Type RS3/250 Value 250 Ohms
1 Resistance Standard Type RS3/400 Value 400 Ohms
1 Resistance Standard Type RS3/25.5 Value 25.5 Ohms
1 Resistance Standard Type RS3/62.5 Value 62.5 Ohms
1 mV source -75 ... 0 ... +75 mV
1 Pt100 sensor and measuring instrument
1 Calibration Lead Type TS01
The Value of the resistance standards should be known with an uncertainty ±5ppm or better
Suitable resistance standards are available for calibration together with a calibration connection lead, please consult
our sales staff.

Environment

PLUS
We expect the TTI 7
you wish to replace it. Isotech will continue to develop new instruments and to update the design of existing models
and, therefore, will be able to offer an instrument suitable for your needs.
When disposing of the batteries care should be taken to comply with current legislation concerning their disposal. If in
doubt the batteries can be returned to our factory for safe disposal. In addition to the 2 sealed lead acid batteries
there is also 1 nickel cadmium battery which supports the logging memory.
DO NOT DISPOSE OF BATTERIES IN FIRE
WARNING
DO NOT SHORTCIRUIT
DO NOT PUNCTURE, OPEN, DISMANTLE OR OTHERWISE MECHANICALLY INTERFERE
WITH THE BATTERIES.
DO NOT SWALLOW
to give long and trouble free service but, as with everything, there will come a time when
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TTI-7 Iss.02 – 06/11