Action Instruments - TransPak - T773 - Frequency Input Isolating, Field Configurable Two-Wire Transmitter

T773
Frequency Input, Isolating Field Configurable
Two-Wire Transmitter

TECHNICAL SPECIFICATION (T773)
Input	Type:	Capacitive coupled
	Minimum Amplitude:
	105-2150Hz:	10mVrms
	>2150Hz:	15mVrms
	Maximum Amplitude:	35Vp-p
	Impedance 100-1KHz:	>6k Ohms
	>1KHz:	>40k Ohms
Output Span		4-20mA/10-50mA, switch selectable
Minimum Output Current		3.3mA, typical
Maximum Output Current
	4-20mA:	24mA, typical
	10-50mA:	58mA, typical
Supply Voltage Range
	4-20mA:	13 to 75VDC
	10-50mA:	13 to 50VDC
Line Regulation		0.07% of span (13-75V)
Load Regulation		0.05% of span (0-3k Ohms)
Voltage Drop		13VDC @ 20mA
Stability	Zero:	±0.015% of span/°C, typical, ±0.028%/°C, max.
	Span:	±0.022% of span/°C, typical, ±0.043%/°C, max.
Overall Accuracy (Includes Linearity, Hysteresis, Stability)
		±0.2% of adjusted span, max.
Zero Adjustability		30% “turn-up” of span
Span Adjustability		80% “turn-down" of full-scale limit (Table 1)
Repeatability		±0.05% of span
Response Time (63% response)
	<9KHz:	500mSec.
	>9KHz:	40mSec.
Output Ripple, P-P (% at max. input range frequency; 0% turn-down)
	Range 1:	0.5% (18KHz)
	Range 2:	0.5% (9KHz)
	Range 3:	0.7% (2100Hz)
	Range 4:	1.2% (525Hz)
Common Mode Rejection		60Hz: 97dB, DC: 120dB
Common Mode Range
	60Hz:	75Vrms, max.
	DC:	1KV, max.
RFI Effect (1.5W, 470MHz at 1.5 ft.)		<1% of span error
Isolation		1000Vrms maximum input to output, input to case, output to case
Operating Temperature Range
	4-20mA:	-40 to 80°C (-40 to 176°F)
	10-50mA:	-40 to 60°C (-40 to 140°F)
Weight		0.58lbs
Agency Approval		CSA approved intrinsically safe for hazardous locations (File No. LR42272-70).

Calibration

Input Range:	1
Output Range:	4-20mA

Open the access lid on the top of the unit (see Top View Diagram).
Select the output range using switch S6. The CLOSED position selects a 10-50mA output. The OPEN position selects a 4-20mA output.
Select the input range from Table 1 and configure switches S1 through S5.
Determine the percent of span by the ratio of the desired maximum input to the input limit in Table 1 (e.g., 1000Hz/2100Hz = 48%).

Set the step Span rotary switch to the desired percent of span (e.g., 48% = position 4).

Percent of Span	Position
100%	A
>90%	9
>80%	8
>70%	7
>60%	6
>50%	5
>40%	4
>30%	3
>20%	2

Determine Zero turn-up % by the ratio of desired minimum input to the desired maximum input (e.g., 0/1000Hz = 0%).

Set step Zero turn-up switch to offset %. (e.g., 0% = position 0).

Zero Turn-Up %	Position
0%	0
>10%	1
>20%	2
>30%	3

Connect the input to a calibrated frequency source. Connect the output loop to a voltage supply and monitor the output current (refer to the terminal wiring).
Set the calibrator to the desired minimum and adjust the fine zero to obtain an output of either 4mA or 10mA.
Set the calibrator to the desired maximum and adjust the fine span to obtain an output of either 20mA or 50mA. Repeat steps 9 and 10, if necessary, for maximum accuracy.

Note: If loop current "swings" on input ranges 1-2, close S-5 for extra filtering.

Field Mounting
The T773 is designed for installation in industrial field environments. A sealed, diecast aluminum housing protects against corrosion, moisture, dust and electrical noise such as radio-frequency (RFI) and electromagnetic (EMI) interference.

For protection against extreme moisture, hosedirected water (NEMA 4) or hazardous environments, use the T805 explosion-proof housing. The T805 provides a 1/2" and 3/4" FPT port for operation in harsh process environments. The T805 is FM and CSA certified for use in Class I, Groups B, C & D and Class II, Groups E, F & G hazardous locations.

Last Updated Thursday, July 28, 2005

T773Frequency Input, Isolating Field ConfigurableTwo-Wire Transmitter

T773
Frequency Input, Isolating Field Configurable
Two-Wire Transmitter