Martel Electronics T140 Series - Manual (Page 8)

6. The T140 can be used to hold a pressure
reading to be viewed after the pressure has
changed. Pressing the HOLD key enables
the hold function, pressing HOLD again
disables it.
6. Accuracy
The T140 is checked against a NIST traceable
reference before shipment to verify that it meets
its accuracy specification. This accuracy is
based at 25°C and error allowances must be
made when operating at extreme temperatures.
The specifications below list the stability and
operating temperature range of the T140.
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