Differential Pressure Test Set - Crystal Engineering

Catalogue Differential Pressure Test Set

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C R Y S T A L

Differential Pressure Industrial test set User Instructions

i If averaging mode is selected, the lower line will display the averaged differential pressure regardless of what display mode the left hand (+) gauge is in.

ii When only the AVG icon is lit, the second line display is the averaged non-differential reading from the gauge and may not be appropriate for your application.

b Left hand (+) or upstream gauge: Using the ^peakf button, select live pressure readings (no HI or LO icons), or Average pressure over 10 reading (both ^hi^ and icons).

3 Pressure Connections: Connect upstream (+), downstream (-), and their corresponding vent lines to the four 1/8" FNPT connection ports located near the hinge of case. Use pipe thread tape or pipe thread sealant as necessary to ensure a leak free connection.

a Always use a wrench on the test set bulkhead ¹/₈" FNPT fitting, as there is a limit to how much rotational force can be applied to the case.

b Due to the robust nature of the Crystal XP2I gauges, full scale pressure may be applied to either gauge at any time without damage.

4 Zero Gauges: Zero both gauges in the vented condition by pressing the kerc\ button on each gauge. Figure 2 illustrates the appropriate valve states to ensure venting and isolation between both gauges.

Using Crystal Engineering's Differential Test Set based XP2i-DD and XP2i gauges, it's possible to perform pressure differential measurements. By simply connecting your upstream (+) and downstream (-) pressure lines to the 1/8" FNPT fittings you are ready to go. This test set is capable of displaying live or average differential pressures (average of 10 samples) depending upon which display mode you select.


	+ vent	— vent
	¹—DHCJ—¹ / Single- \ or Dual-line \ display J	¹——¹ / Dual-line \ / display \ I (Second line is 1 \ DP Measurement) /

	Figure 1: General piping interconnect diagram.
	Operation A typical differential pressure the following manner.	measurement may be done in

1 Select Units: Select your required unit of pressure measurement on each gauge by pressing the [ unitsfr button on each gauge independently. You may select different

units for each gauge but they must be set individually. The differential pressure will be displayed on the lower line of the right (-) dual display gauge and will be in the same units as the static pressure.

2 Select Display Options: Select the appropriate display option on each unit using the ^peaW button:

a Right hand (-) or differential manufacturers of pressure gauge: Using the Jpeaa button, select live pressure display (both ^hi^ and icons), or Average pressure over 10 readings (both ^hi^ , and AVG icons). Static pressure will be display on the primary line and the differential pressure will be displayed on the secondary or lower line;

Figure 2: Zero gauge valve states.