Practical Instrument Electronics 531 User Manual

Electronics

Model 531

82 E. Main Street Suite 3.14 • Webster, NY 14580

Tel: [phone] • Fax: [phone]

[e-mail] • http://www.piecal.com/

1-4

j

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4-20 Milliamp Loop Calibrator

Operati n g Instructions

Practical Instrument

Basic Keypad O pera tions

EZ-Check™ Switch

SOURCE mode: Slide the switch to select from Hi and low range p re -

set values and the mid ranger (Dial) is selectab le . Dial the mid range
value and it w ill store the value with-in 5 seconds automatically.

READ mode: Slide the switch to recall minimum and maxim u m
readings. P re ss t he EZ-Dial™ Knob to clear the stored value s.

k SOURCE/OFF/READ Switch

Slide the SOURCE/OFF/READ Switch to SOURCE to
output a mA signal and to do 2 - wire transmitter
simulation. Use the READ posit ion t o read mA signal and
power & measure 2 – wire t ransmitter.

EZ-Dial™ Knob

Turn the knob to change display in 0.01mA increments.
Push and turn for faster dialing. Push without turning to
clear EZ-Check™ HI/LO points in READ mode.

Press twice t o se l e ct options:

In Source mode select –
% or mA
2-Wire Transmitter Si mulate
% or mA
low power (15V) or High power (24V)

In Read mode select -
% or mA
Power and Measure 2-Wire Transmitter
% or mA
low power (15V) or High power (24V)

HART® Protocol

An internal jumper enables the Power & Measure 2 – wire
transmitter mode to be compatib le with H A RT®
communicators and tra nsmitters.

EZ-Dial™ Knob

Adjust the output up and down with the EZ-Dial k nob . The in creme n t is 0.01 mA (or 0.1 % if display units are % of 4-20 mA.)
Press while turning to a d just 10X f a ste r – 0.10 mA (or 1.00 %.)

Quick Referen ce Ba r Gra ph

The Quick Reference Bar Graph indicates the input and output level to the Model 531 in % of 4-20 mA with 1.0% resolution. If the
input or output signal is ou tside the normal operating rang e of th e Model 531 the Quick Reference Ba r G raph in source mode will
flash, in Read mode display over range when above 24.5mA.

Error Cond itions

Bar Graph wi ll flash when any error condit ions exist.

HART® Pr otocol

Remove the back of the case and remove the jumper that is located in position J6 on the PC board . By doing so it place s a 25 0Ω
resister in series with th e output of the model 531. This inte rna l re siste r e liminates the need to add an e x te rna l loa d re sister when
communicating with a HA RT® transmitter. This reduces the typica l d riv e capability to 950Ω.

Practical Instrument Ele ctr onics, Inc. Copyri ght  2011. All rights reserved.

531-9002 Rev B 7/13/11

Model 531 Operating Instructions

82 E. Main Street Suite 3.14 • Webster, NY 14580

Tel: [phone] • Fax: [phone]

[e-mail] • http://www.piecal.com/

Practical Instrument Ele ctr onics, Inc. Copyri ght  2011. All rights reserved.

2-4

( S e n s o r

)

( P r o c e s

s

S i g n a l )

( S i m u l a t e

d

I n p u t

)

R e c e i v e

r

e

y

0

t

o

6

0

V D C

2 - W i r e

T r a n s m i t t e r

T r a n s m i t t e r

I n p u t ( S e n s o r ) ( P r o c e s s

S i g n a l )

( S i m u l a t e

d

I n p u t

)

R e c e i v e r P o w e r

S u p p l y 0

t

o

6

0

V D C

T y p i c a l

2 - W i r

e

T r a n s m i t t e r

+

I

N

- R E F + O U T -

EZ-Check™ Switch

The EZ-Check™ switch ha s t hree positions -- high, dial, and low. Its position is shown at the left e d g e of the d isplay with “HI” and
“LO” indicators. N e ithe r in d icator in d icates the middle position. Use of th e EZ -Check switch depends on mode.

Source Mod e s:

Read Modes:

Source Mode

Slide the EZ-Check switch to the HI and LO positions to recall t he p re se t settings (Hi=20.00mA & Lo=4.00mA).

Hint: For faster calibrations, the position of the switc h ca n b e felt. This feature allows continuous monitoring of the device
being calibrate d wit hout looking back at the Model 531 disp lay. This is also useful in poor lighting or un d e r d if f icu lt op e ra ting
conditions.

In read mode, the Model 531 calibrator records the maximum and min imum re adings observed in each mode. Slide the EZ­Check switch to the Dial position to read the loop . The n S lid e th e EZ -Check switch to the HI and LO positions to display

the max and min re a dings. Press

EZ-Dial knob to clear the read in g s. The d isp lay will flash “CLEARED” to confirm.

T r a n s m i t t e r

Source mode uses intern al power to supply current from 0.00-24.00 mA into as much as 1200Ω until the end of battery life. The
calibrator Graph wil l f lash if connected improperly. The three-position EZ-Check sw itch provides instant p rese t 4mA at zero, 12mA at
mid range and 20mA a t f u ll scale outputs. The output is adjusted in 0.01 or 0.10 mA increments (0.1 or 1.0) % display units with
the EZ-Dial knob.

I n p u t

+

I N

- R E F + O U T -

T y p i c a l

P o w

r

S u p p l

2-Wire Transm itter S imulation Mode

The Model 531 can simulate a 2-wire transmitter in the 4-20 mA or % process loop. In source mode press the EZ-Dial™ Knob twice
to get into the feature op tions. Then p ress the E Z -Dial™ Kno b to select mA 2 – wire. The EZ-Check switch and EZ-Dial kn ob a llow
rapid and fine con trol of loop current.

531-9002 Rev B 7/13/11

Model 531 Operating Instructions

82 E. Main Street Suite 3.14 • Webster, NY 14580

Tel: [phone] • Fax: [phone]

[e-mail] • http://www.piecal.com/

Practical Instrument Ele ctr onics, Inc. Copyri ght  2011. All rights reserved.

3-4

T r a n s m i t t e r

I n p u t ( S e n s o r )

( P r o c e s

s

S i g n a l ) ( S i m u l a t e d

I n p u t

)

R e c e i v e

r

P o w e r

S u p p l

y

0

t

o

6

0

V D C T y p i c a

l

2 - W i r

e

T r a n s m i t t e r

+

I

N

- R E F + O U T -

T r a n s m i t t e r

I n p u t ( S e n s o r ) ( P r o c e s s

S i g n a l )

( S i m u l a t e

d

I n p u t ) R e c e i v e r P o w e r

S u p p l y 0

t

o

6

0

V D C

T y p i c a l

2 - W i r

e

+

I

N

- R E F + O U T -

Power and Meas ur e Tra n smitter Mode

The Model 531 supplies 15Volt s or 24 V olts to the transmitter and displays the output in mA or % on th e M od e l 531 display. In re ad
mode press the EZ-Dial™ Knob twice to get into the feature options. Then press the EZ -Dial™ Knob t o select mA PWR - M. Then turn
EZ-Dial™ Knob to select power range (15V or 24V). The EZ-Check switch and EZ-Dial knob allow rapid an d f in e control of loop
current.

Read Mode

T r a n s m i t t e r

The Model 531 can read loop currents from 0-24 mA . T he Mod e l 531 limits current in read mode to 25mA to p rotect the devices in
the loop from over v olt ag e o r ov e r curre nt conditions.

531-9002 Rev B 7/13/11

Model 531 Operating Instructions

82 E. Main Street Suite 3.14 • Webster, NY 14580

Tel: [phone] • Fax: [phone]

[e-mail] • http://www.piecal.com/

Practical Instrument Ele ctr onics, Inc. Copyri ght  2011. All rights reserved.

4-4

Operating Tempe rat ure Ra ng e

-20 to 60 °C (-5 to 140 °F)

Miscellaneous

Low battery indication with nominal 1 hour of operation le ft

Accuracy

≤ ± (0.05 % of Reading + 0.01 mA)

Temperature effect

≤ ± 50 ppm/°C of Range

Voltage burden

≤ 1V at 20 mA

Battery life

Typical ≥ 40 Hours

Overload/Current limit protection

nominal ≤ 24 mA

Miscellaneous

Open loop or out of comp lian ce conditions are indicated b y app rop riat e e rror d isp lay

Specifications

General Specifications:

(Unless otherwise ind icated all specifications are rate d from a nominal 23 °C, 70 % RH for 1 year f rom calib ra tion )

Storage Temperature Range -30 to 60 °C (-22 to 140 °F)
Relative Humidi ty Ra nge

Battery 2 AA Alkaline

Common Specifications for all current modes

Ranges 0.00 to 24.00 mA, 25.0 to 125.0% of 4-20 mA

10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing
10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing

Over-voltage p rote ction to 120 V rms (rated for 30 seconds) or 240 Vrms (rated for 15
seconds)
Bar graph disp lay with 1% resolution of 4-20 mA signa l scale
High contrast graphic liq u id crystal display with 0.45” (11.4 mm) h ig h digits

Resolution(s) 0.01 mA and 0.1 %

Source/Power and Measure 2-Wire Transmitter Specifications:

Loop compliance voltag e ≥ 15 Volts or ≥ 24 Volts
Loop drive capab ility 1200 Ω at 20 mA for e ntire b a tte ry life @ 24 Volts

600 Ω at 20 mA for entire battery life @ 15 Volts

Read mA Specifications:

Overload/Current limit protection nominal ≤24 mA

2-Wire Transmitter Simulation Specifications:

Voltage burden ≤ 2V at 20 mA

Loop voltage limits 2-42 VDC

Battery life ≥ 40 hour typical

Warranty

Our equipment is g ua ran te e d a g ai nst d e f e ctive material and workmanship (excluding batteries) for a period of thre e y e a rs from the
date of shipment. Claims under guarantee can be made by returning the equipment prepaid to our factory. The equipment will be
repaired, rep lace d or a d juste d a t our op t ion. The lia b ilit y of P ractical Instrument Electronics (PIE) is restricted to that given under our
guarantee. No re sp onsib il ity is a ccep te d for damage, loss or other expense incurred through sale or use of our equipment. Under no
condition shall Practical Instrument Electronic s, I nc. b e lia b le f or a ny special, incidental or consequential d a mag e .

531-9002 Rev B 7/13/11