Altek Model 934 Milliamp Voltage Loop Calibrator Manual
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9 OPERATING INSTRUCTIONS RANGES MILLIVOLTS - mV Choose mV to display directly in millivolts DC. Use 0 to 100 millivolts to check recorder or analyzer inputs. SOURCE from 0.00 to 999.90 mVDC. In READ the 934 autoranges between -999.90 to +999.90 millivolts and -99.990 to +99.990 VDC. ENGINEERING UNITS - ENG. UNIT Choose ENG. UNIT to match the display of the instrument being calibrated (see page 10 for instructions). Any span in mA, mV or V in Source or Read can be scaled to display a maximum of between...
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10 OPERATING INSTRUCTIONS USING ENGINEERING UNITS Scale the display of the Model 934 to match the display of the instrument being checked. Any span in mA, mV or V in Source or Read can be scaled to display between a maximum of -90000 to +90000 with zero to three digits to the right of the decimal. The previously stored Engineering units can be recalled by using the following procedure without turning the knob. 1) Press & hold both theSTORE & RESET push- buttons for 1 second to enter the SETUP mode. The...
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11 OPERATING INSTRUCTIONS USING ENGINEERING UNITS 3) Turn the knob (Digital pot) to scroll through the available functions. Each enabled function will flash on the LCD.“ ENG. UNIT” will appear as a choice for each SOURCE or READ function. Press the STOREor RESET push-button to proceed. 4) The word ZERO will appear in the top half of the LCD prompting you to enter the lowest value for the range in mA, V or mV that will be sourced or read. Turn the knob until the lowest value of your chosen range flashes...
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12 OPERATING INSTRUCTIONS USING ENGINEERING UNITS 6) You are now prompted by flashing zeros to enter the decimal point position for the engineering units you have chosen. Turn the knob until the decimal point appears in the location to match the resolution of the display on the instrument you will be calibrating (from zero to three digits to the right of the decimal point). Press the STORE or RESET push- button to continue. 7) The word ZERO and ENG. UNIT will appear in the top half of the LCD prompting...
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13 OPERATING INSTRUCTIONS USING ENGINEERING UNITS 8) The word SPAN and ENG. UNIT will appear in the bottom half of the LCD prompting you to enter the highest value for the range in the units to match the display of the instrument being calibrated. Turn the knob until the highest value of your chosen range flashes in the bottom half of the LCD. Press the STOREor RESET push-button to continue. 9) The Model 934 will now begin operating with the ranges and Engineering Units you have selected. If Engineering...
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14 OPERATING INSTRUCTIONS SOURCE MODE SOURCE 1) Move the POWER switch to ON 2) Press & hold both the STORE & RESET push-buttons for 1 second to enter the SETUP mode. The word SETUP will appear in the LCD and the words SOURCE and READ will alternately flash. Release both push-buttons. 3) Press the STORE push-button. The words SETUP and SOURCE will remain on the LCD and the previously selected function will repeatedly flash. 4) Turn the knob (Digital-Pot) to scroll through the available functions. Each...
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15 OPERATING INSTRUCTIONS SOURCE MODE Whenever SOURCE mode is selected the word SOURCE will appear on the LCD display. To change the output value, turn the speed sensitive digital pot. Turning the knob slowly will cause a gradual change in the output. A faster rate of change will occur when the knob is turned faster. This function operates in all three output positions (HI, SET & LO). ALTEK 934 20.000mA VA LV E OR RECEIVER I/P 30 OPERATING INSTRUCTIONS READ FUNCTIONS The READ functions measures the...
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16 OPERATING INSTRUCTIONS SOURCE MODE STORING QUIK-CHEK OUTPUTS 1) Switch to HI or LO 2) Turn the knob to desired value 3) Press the STORE push-button The LCD will flash once to show that the value was saved If a value is in the SET position and you want that value stored in HI or LO, press and hold the STORE push-button while moving the switch to HI or LO. The display will flash once to indicate the value has been stored. Then release the STOREpush-button. RECALLING QUIK-CHEK OUTPUTS Any time you...
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17 ALTEK 934 20.000mA VA LV E OR RECEIVER I/P OPERATING INSTRUCTIONS SOURCE FUNCTIONS The SOURCE functions generate or control the desired signal. Multiple scales are available for each function. Engineering Units & % DP Flow must be enabled before they are available for selection. CALIBRATE MILLIAMP INPUTS mA, mA %, mA ENG. UNIT, mA % DP FLOW Choose this function to provide an output from 0.000 to 24.000 milliamps. The compliance voltage is a nominal 24 VDC to provide the driving power to your milliamp...
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18 OPERATING INSTRUCTIONS SIMULATE 2-WIRE TRANSMITTERS 2-WIRE SIM mA, 2-WIRE SIM %, 2-WIRE SIM ENG. UNIT, 2-WIRE SIM % DP FLOW Choose this function to simulate a 2-Wire Transmitter output from 3.000 to 24.000 milliamps. Operates in loops with power supply voltages from 2 to 45 VDC. 1) Disconnect existing 2-Wire Transmitter from the loop 2) Connect the red SOURCE lead of the calibrator to the plus (+) input of the field connections and the black SOURCE lead to the minus (-) The simulated output of the...