Valhalla 2720 GS
Wahl 392M
Leeds and Northrup 93301
Lab stock
General Cement 8867 or
Local supply
Omega PHA–4, PHA–7
& PHA–10 or
Orion 910104, 910107 &
910110
Corning 00311207H
Beckman 39848 or 39841
Orion Research 91–06
Beckman 39099
Beckman 598115 or
VWR Scientific 34100–787
Minimum Use
Specifications
Item
Calibration
Equipment
2.1 DC millivolt
source
2.2 Digital
thermometer
2.3 Temperature
chamber
2.4 BNC shorting
connector
2.5 Alignment tool
2.6 Standard premixed
buffers
2.7 pH electrode(s)
2.8 ATC temperature
probe(s)
Range: 0 to 1999 mV
Uncertainty: +
0.01% of setting, +20 V
Range: 15 to 30 C
Uncertainty: +0.125 C
Range: ambient
Uncertainty: NA
Fit #4 or #6 stud on trimpots
Range: 4.01, 7.00 and 10.01 pH
Uncertainty: Refer to certificates of
traceability
Supplied with TIs:
Corning M103
Beckman PHI 31
Orion Research 201
Beckman 2000
VWR Scientific 34100–674 (with
temperature sensor affixed)
Supplied with TIs: Beckman PHI 31
Table 2. Equipment Requirements
SECTION 3
PRELIMINARY OPERATIONS
3.1 TEST CONTROL SETTINGS
3.1.1 Ensure that all power switches are set to off, and set all auxiliary equipment controls as necessary to avoid damage to
the equipment and so that dangerous voltages will not be present on output terminals when the power switches are turned on.
3.1.2 Disconnect the TI electrode(s). If an ATC temperature probe is supplied, ensure it is also disconnected from the TI.
3.1.3 Short the TI pH input connector using the BNC shorting connector (item 2.4). If the TI is the Beckman 2000, short the
G.E. connector on the rear panel.
3.1.4 Set the TI controls as specified on the applicable TI checklist.
3.1.5 Verify that the TI indicates within the specified limits (refer to applicable TI checklist).
3.1.6 Repeat step 3.1.3 through 3.1.4, where applicable.
NAVAIR 17–20SC–42
2
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