REED R5820 User manual

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LOOP Calibrator
User Manual

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WARRANTY
Our company warrants to the original purchaser that each product it manufactures will be free from defects in
material and workmanship under normal use and service for a period of one year from date of purchase. Our company’s
warranty does not apply to fuses, test leads or any product which, in our company’ s opinion, has been misused, altered,
or damaged by accident or abnormal conditions of operation or handling.
To obtain warranty service, contact your nearest Service Center (or send the product, with a description of the
difficulty, and postage prepaid, to the nearest Service Center). Our company assumes no risk for the damage in transit.
Our company will, at its option, repair or replace the defective product free of charge or refund your purchase price.
However, if our company determines that the failure was caused by misuse, alterations, accident or abnormal condition
of operation or handing, you will be billed for the repair and the repaired product will be returned to you transportation
prepaid.
SHIPPING TO MANUFACTURER
FOR REPAIR OR ADJUSTMENT
All shipment of our company’s instruments should be made via United Parcel Service or “Best Way” prepaid. The
instrument should be shipped in the original carton; or if it is not available, use any suitable container that is rigid and of
adequate size. If a substitute container is used, the instrument should be wrapped in paper and surrounded with at least

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four inches of excelsior or similar shock-absorbing material.
CLAIM FOR DAMAGE IN SHIPMENT
TO ORIGINAL PURCHASER
The instrument should be thoroughly inspected immediately upon original delivery to purchaser. All material in the
container should be checked against the enclosed packing list. The manufacturer will not be responsible for shortages
against the packing sheet unless notified immediately.
If the instrument is damaged in any way, a claim should be filed with the carrier immediately. (To obtain a quotation
to repair shipment damage, contact the nearest Service Center.) Final claim and negotiations with the carrier must be
completed by the customer.

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INDEX
P a g e
1. Safety Information………………………………………………………………………………………………………… 1
2. Instrument Panel Layout and Functions……………………………………………………………………………… 2
3. Instrument Maintenance………………………………………………………………………………………………… 3
4. Power-on/off of Instrument……………………………………………………………………………………………… 4
5. Output from Instrument……………………………………………………………………………………………………5
6. Instrument Measurement…………………………………………………………………………………………………7
7. Setting Function………………………………………………………………………………………………………… 10
8. Performance Index……………………………………………………………………………………………………… 11
9. Calibration…………………………………………………………………………………………………………………12
10. Notice of the Manual………………………………………………………………………………………………………15

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Section One Safety Information
To ensure the safety operation, the following signs are used only as
specified in this operation instruction：
Warning A warning shows that if the operation does
not comply with the following correct
instruction it is possible to bring hazards to
the user or cause damage to the
instrument in use. The warning also points
out how to avoid the accidents.
Caution A caution shows that if the operation does
not comply with the following correct
instruction, it is possible to cause damage
to the instrument in use .The caution also
points out how to avoid mal-operation.
Note A note serves as a sign to remind the user
that is must understand the correct
operation of the instrument and its
characteristics.
To prevent the user and the Instrument from any electric shock and
other hazards, it is necessary to observe the following regulation:
Warning
• It is not allowed to operate the Instrument at the working field where
there exists flammable gas or explosive gas or vapor. It is very
dangerous to operate the instrument in such a surrounding.
• Never apply more than 30V between any two terminals, or
between any terminal and earth ground.
Caution
• No one is allowed to remove the split case of the Instrument except
professionals.
• Periodically wipe the case with a damp cloth and detergent; do not
use any corrosive solvents.
Note
• To keep the Instrument in a designed accuracy, it needs warming
up 5 minutes before it is put into operation.
• If any user requires a higher accuracy of the calibrator, he or she is
requested to make contact with the manufacturer or our product
distributors.

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Section Two Instrument Panel Layout and
Functions
lustration of LCD Display Area
LCD
Display
Are
a
Power
s
wit
c
hkey
Single
step/auto-sw
itch key
25% single
step setting/
auto-ram
p
mA%/unit
select key
Output/in
put switch
0% &
100% of
setting/aut
o-ramp
start key
τυInput
digit
π
θ
Output
value
Input/outp
ut
terminal

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OUTPUT ：
Press the key〔OUTPUT / IN / SW〕when
the symbol OUTPUT appears. It denotes that the
Instrument is in a state of output.
INPUT ：
Press the key 〔OUTPUT / IN / SW〕when
the symbol INPUT appears. It denotes that the
Instrument is in a state of input.
CAL ： When the symbol CAL appears, it denotes
that the Instrument is in a state of calibration.
0 FS ：
When the symbol ‘O’ or ‘FS’ appears during
the calibration, it denotes that the zero point or the full
scale point is being calibrated.
： When this symbol appears, it denotes that
the battery is nearly used up and needs replacing.
π ： When this symbol appears, it denotes that
the output digits need setting.
V、mA 、% ：
These symbols denote the units of both
present input and output values.
ON、OFF ：
These symbols denote the turn-on or turn-off
of any input / output signals.
：These symbols denote the high and low-speed
auto-ramp, auto-step ramp.
Section Three Instrument Maintenance
This section provides some basic maintenance
procedures. Repair, calibration, and servicing not
covered in this manual must be performed by qualified
personnel. For maintenance procedures not described in
this manual, contact a Service Center.
General Maintenance
Periodically wipe the case with a damp cloth and
detergent; do not use abrasives or solvents.
zTake out the batteries if the Instrument will not be
used for a long time.
zDirt or moisture in the terminals can affect readings.
Clean the terminals as follows:
1) Turn the Instrument off and remove all test
leads.
2) Shake out any dirt that may be in terminals.
3) Soak a new swab with alcohol. Clean each
terminal with the swab.
Replacing the Batteries

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This Instrument is powered by two AA batteries (IEC
LR6).
Warning
To avoid electrical shock or personal injury:
zRemove Test Leads from the Instrument before
opening the battery door.
zClose and latch the Battery Cover before using the
meter.
Note
zThe new and old Batteries cannot be mixed.
zMake sure the battery’s odes are in accordance with
the marks illustrated in battery pool when replacing
them.
zTake out the batteries if the meter will not be used
for a long time.
zDispose the old batteries in accordance with the
local law.
Replace the batteries as follows.( See Figure 3-1):
1) Turn off the Instrument and remove all Test
Leads from the Terminals;
2) Take off the protector of the Instrument; remove
the battery cover by using a standard-blade
screwdriver to turn the battery door fasteners,
and then take of the battery case;
3) Replace with two new batteries;
4) Reinstall the battery case and tighten screws.
Figure 3-1 Replacing batteries
Replacing Fuse
Warning
To avoid personnel injury or damage to the meter,
use only the specified fuse. The specification is 63mA
250V fast-melt.
Replace the fuse as follows (Refer to Figure 3-2 if
necessary):
1) Remove the test leads from the meter and turn
the meter OFF;
2) Take off the protector of the meter, remove the
four screws by using a standard-blade screwdriver, and
then take off the cover;
3) Replace the blown fuse(s);

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4) Reinstall the cover;
5) Reinstall the meter’s protector.
Figure 3-2 Replacing fuses
Section Four Power-on/off of Instrument
Power on/off
Press the power key to turn on the power supply of
the Instrument. Then repress it to hold it in one second
and the power will be off.
When the power is turned on, the Instrument starts to
make self-diagnosis internally and the full screen is in
display. After this, appropriate operation should be
carried out.
Note
To ensure correct operation of the Instrument, it is
recommended to turn off the power pausing 5 seconds
and then restart the Instrument.
Automatic Power-off
The factory default setting is that the Instrument will
cut off the power automatically if no operation applied to
the Instrument within 15 minutes.
Users can decide whether they want to use this
function or not.(See Section 7 for reference)
Section Five Output from Instrument
The Instrument produces the DC current from its
appropriate output terminal（OUTPUT）set by the user or
simulating a transmitter.
Caution
Do not apply voltage to the output terminal during the
operation. If any improper voltage is applied to the output
terminal, it will cause damage to the internal circuit.
Output Operation Procedure

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Function
Operation
%
Operation Display Setting Range
DCI
20mA
20 mA
2
%
00.000 mA
-025.00
mA %
00.000～22.000
mA
-025.00～112.50
mA %
Current Output
1) Insert one end of the test leads to the + mA –
output jack （OUTPUT ）of the Instrument and
connect the other end with the input of the user’s
Instrument as shown in Figure 5-1:
MAX
30V
30V
MAXMAX
30V
INPUT
OUTPUT
COM
mA
V
+LOOP
XMT+mA-
+
Figure 5-1
2) Press the key〔OUTPUT/IN〕, and the OUTPUT
appears in the display. It denotes that the
Instrument is in an output state;
3) Press the key〔mA%/V〕, to select the output to be
set in ‘mA’or %, and then the unit mA or mA%
appears, in which 0% denotes 4mA; 100% denotes
20mA;
4) Press the key〔τ〕/〔υ〕to select the set digits of the
output;
5) Press the key〔π〕/〔θ〕to change the value of the set
digits. The value can do carry or number decrement
automatically. Hold the pressed key in one second
and the numerical value will keep varying.
25% Step Current Output
1) Connect to the Instrument as shown in Figure 5-1;
2) When the key 〔OUTPUT/IN 〕is pressed, the
OUTPUT appears in the LCD, it denotes the
Instrument is in an output state;
3) Press the key〔25%/RAMP〕and the symbols‘’ and
‘π’will appear;
4) Press the key 〔mA%/ V〕to select the output to
be set in mA or %, and then the unit ‘mA’or‘mA %
appears;
5) Press the key 〔π〕/〔θ〕to change the output in a
value of 25%, in which 0% denotes 4mA and 100%
denotes 20mA;