Extech Instruments 48VFL Instruction Manual Download Page 9 | Manualshive

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48VFL & 96VFL v1.2 07/13

The controller can also be set to ON/OFF, PI, PD and P control mode. Set Pb = 0 for
ON/OFF control mode. Set ti = 0 for PD control mode. Set td = 0 fro PI control mode and ti,
td = 0 fro P control mode. The Hysteresis (dead band) for ON/OFF control operates as
follows:

ON

OFF

SP-HYST

▲

SP+HYST

SP

When the second control output (output 2) is used, the proportional band of output 2
and the dead band interact as detailed below:

Output

Heating Cooling

PV

Overlap Dead

Band Band

■

ERROR MESSAGE AND TROUBLESHOOTING

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Summary of Contents for 48VFL

Page 1: ... parameter value SHIFT KEY Press the shift key for 5 seconds to execute Auto Tune process Yes 1 mode To abort an Auto Tune process press and hold the shift key for 5 seconds Press the SET and UP keys once to return the normal operation LEVEL KEYS Press and hold the SET SHIFT keys simultaneously for 5 seconds to select the programming level and then press the SET key to enter the selected level Pre...

Page 2: ...ct model number and options 2 For thermocouple input use the appropriate compensation wire And note the polarity of input signal 3 To avoid noise induction keep input signal wires away from instrument power lines load lines and power lines of other electrical equipment www com information itm com 1 800 561 8187 ...

Page 3: ...g Level 5th Prog Level 1 When 2nd Output Cooling is not selected CPb Cti Ctd HYS2 and db parameters are not available 2 When Pb 0 0 HYS1 will be skipped 3 When CPb 0 0 HYS2 will be skipped 4 When Pb 0 0 ti td will be skipped 5 When CPb 0 0 Cti Ctd will be skipped www com information itm com 1 800 561 8187 ...

Page 4: ...00 99 59 10 Auto tuning is disable Standard type auto tuning Autotune PV is compared wit SV during auto tuning Low PV type auto tuning PV is compared with SV 10 FS during Auto tuning no Disable the manual mode Manual control Enable the manual mode no Output percentage Adjustable when Hand is set to Yes 100 0 100 0 0 0 SOFT LEVEL Code Description Range Default Ramp rate for the process value to lim...

Page 5: ...2000 0 0 200 0 1 Hysteresis for ON OFF control on output 2 0 2000 0 0 200 0 1 Hysteresis of alarm 1 0 2000 1 Hysteresis of alarm 2 0 2000 1 Dead band value This defines the area in which output 1 and output 2 are both active negative value or the area in which output 1 and output 2 are both inactive positive value 1000 1000 100 0 100 0 0 Set point offset This value will be added to SV to perform c...

Page 6: ...nput only 0000 000 0 00 00 0 000 0000 Output 1 control action Reverse action for heating Direct action for cooling Low limit of span or range Set the low limit lower than the lowest expected SV and PV display Full range 0 High limit of span or range Set the high limit higher than highest expected SV and PV display Full range 1000 Software filter 0 0 99 9 10 0 Time scale for timer alarm Hours Minut...

Page 7: ...near Input 1 Press and hold the UP and DOWN keys simultaneously for 5 seconds to access the LnLo parameter 2 Adjust LnLo setting to correspond to the low scale after adjustment press key once to access LnHi 3 Adjust LnHi setting to correspond to the high scale after adjustment press key once to exit ALARM FUNCTION A1FU A2FU ALARM TYPE ALARM OUTPUT OPERATION Alarm function OFF Output OFF Process hi...

Page 8: ...he right most decimal MA on the SV display will flash The parameter will then alternately display and the process value The output percentage can then be adjusted using the UP or DOWN keys To abort the manual control simply set to AUTO TUNE In order to automatically set the PID parameters in the PID level Pb proportional band ti integral time also known as reset and td derivative time also known a...

Page 9: ...ode and ti td 0 fro P control mode The Hysteresis dead band for ON OFF control operates as follows ON OFF SP HYST SP HYST SP When the second control output output 2 is used the proportional band of output 2 and the dead band interact as detailed below Output Heating Cooling PV Overlap Dead Band Band ERROR MESSAGE AND TROUBLESHOOTING www com information itm com 1 800 561 8187 ...

Page 10: ... AT process to set Pb Ti Td automatically Set Pb Ti Td manually No heat or output No heater power or fuse open Output device defective or incorrect output used Check output wiring and fuse Replace output device LEDs and display not lighting up No power to controller SMPS failure Check power lines connection Replace or repair meter Process Value changed abnormally Electromagnetic Interference EMI o...

Page 11: ...ariable PV in line with the Setpoint Variable SV Available outputs are Relay Pulsed DC and 4 20mA Analog Output Tuning The controller must be tuned for every new application It is strongly recommended that user run the Auto Tune function AT Note that the controller must be wired and ready to go before Auto Tune is started Auto Tune optimizes the controller s response to exactly match the character...

Page 12: ...0Hz automatically accommodates any voltage between 90 to 264VAC Power consumption 5VA Insulation Resistance 50M Noise rejection Common Mode 120 dB Normal Mode 60 dB typical Operating conditions 14 to 122o F 10 to 50o C 90 Relative Humidity max Storage temperature 4 to 140 o F 20 to 60 o C Panel cut out dimensions 1 77 x 1 77 0 02 45 0 x 45 0mm 0 5mm for 48VFL 3 62 x 3 62 0 02 92 0 x 92 0mm 0 5mm f...

Page 13: ...N OFF control with Hysteresis dead band Time proportioning control for relay or pulsed DC output Standard proportional output analog output Automatic tuning Push button activation Automatically tunes the proportional band and integral derivative times Manual Tuning Proportional Band Pb 0 0 to 300 0 of Full Scale Integral time or Reset Ti 0 to 3000 seconds includes anti reset wind up Derivative tim...

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