Keiser AIR250 User manual

SEATED LEG CURL
MODEL 1221XX & 1222XX
OPERATION MANUAL
AIR250
STRENGTH |CARDIO |FUNCTIONAL
Air250 Seated Leg Curl shown with Range of Motion Limiter

02
AIR250 SEATED LEG CURL
OPERATION MANUAL
CONTENTS 03 — GENERAL INFORMATION
03_INTRODUCTION
03_REGISTER YOUR PURCHASE
03_SERIAL NUMBER INFORMATION
04 — IMPORTANT SAFETY INFORMATION
06 — TECHNICAL SPECIFICATIONS
06_EQUIPMENT SPECIFICATIONS
06_TECHNICAL DATA
07 — INSTALLATION AND PLACEMENT
07_TRAINING SPACE
08 — OPERATION
08_EQUIPMENT OVERVIEW
09_POWER DISPLAY
10_DISPLAY FEATURES
11_PROPER OPERATION CHECK
12_HOW TO USE THE AIR250 SEATED LEG CURL
13_HOW TO USE THE ROM LIMITER
14_POWER TEST
15 — MAINTENANCE
15_PREVENTATIVE MAINTENANCE SCHEDULE
16_BATTERY REPLACEMENT
17_ANNUAL MAINTENANCE
18 — REGULATORY AND COMPLIANCE NOTICES
18_SAFETY NOTIFICATIONS
19_ELECTROMAGNETIC COMPATIBILITY (EMC)
19_US FCC COMPLIANCE STATEMENT
19_DISPOSAL
20 — WARRANTY STATEMENT
Keiser, the Keiser logo, and other trademarks associated with Keiser products referred to in this publication are trademarks of Keiser Corporation.
© 2020 Keiser Corporation. All rights reserved.
Distribution and copying of this document, use and communication of its contents is not permitted without written authorization from Keiser Corporation. The content
of this document is furnished for informational use only, may be subject to change without notice, and should not be construed as a commitment by Keiser Corporation.
Every effort has been made to ensure that the information in this manual is accurate. Keiser Corporation is not responsible for printing or clerical errors.

03
AIR250 SEATED LEG CURL
OPERATION MANUAL
Congratulations on the purchase of your new Keiser Air250 Seated Leg Curl and welcome to the Keiser family. Keiser’s
Dynamic Variable Resistance safely builds strength at any speed, which is key to building maximum power.
For your safety, and to ensure the best experience and maximum gains, it is critical that you read and understand
this manual before you begin using the Air250 Seated Leg Curl. If you have any questions regarding the operation of
the Air250 Seated Leg Curl after reading this manual, our Keiser Customer Support team will be happy to assist by
telephone at 1 559 256 8000 and via live chat at keiser.com/support (Monday—Friday, 9 am to 5 pm Pacic Time), or
by email at [e-mail].
Yours in Health,
Keiser Corporation
GENERAL INFORMATION
INTRODUCTION
Register your Air250 Seated Leg Curl to stay informed of
safety notications and for faster, more accurate warranty
service.
Scan the QR Code to the right to access the interactive
online warranty registration form or visit:
https://www.keiser.com/forms/warrantyregistration SCAN
REGISTER YOUR PURCHASE
SERIAL NUMBER INFORMATION
Figure 1. Serial Number Location and Information
Serial Number Location
on the Air250 Seated Leg Curl
F
G H I
A
B
C
D
E
J
K
L
0012XXXX
888888-88888
Please take a moment at this time to record the serial number
in the space provided below.
Serial No.:
Serial Number Information
AManufacturer name, logo, and address
BCountry of manufacture
CPatent information notication
DCE mark
ETÜV SÜD Mark
FQuality management ISO standard
GMaximum User Weight Limit
HDirective and standards compliance
IEuropean Authorized Representative
JSerial number and date of manufacture
KModel number and product description
LWEEE Directive Mark

04
AIR250 SEATED LEG CURL
OPERATION MANUAL
It is the sole responsibility of the purchaser of Keiser Corporation
equipment to instruct all individuals, whether they are the end-
user or supervising personnel, on proper usage of the equipment.
Keiser Corporation recommends that all users of its equipment
be informed of the following information before use.
1. Read these instructions.
2. Heed all warnings.
3. Follow these instructions.
4. Consult your physician before beginning any exercise
program.
5. The Air250 Seated Leg Curl is intended for use in training
areas of organizations where access and control are
specically regulated by a person responsible for determining
the suitability of use and maintenance.
6. Maximum user weight limit: 441 lbs (200 kg).
7. Use the Air250 Seated Leg Curl indoor in a climate-
controlled environment only. Keep away from areas of
extreme humidity.
8. The use of this Air250 Seated Leg Curl for any purpose
not explicitly specied by the manufacturer in this manual
is prohibited.
9. Wear proper exercise clothing and shoes for exercise. Avoid
wearing loose clothing that might catch on any moving
parts. Tie long hair back and up away from the Seat Back
adjustment mechanism.
10. The Air250 Seated Leg Curl is not a toy. Children shall not
play with the Air250 Seated Leg Curl. Children under 14 years
old should not use the Air250 Seated Leg Curl. Keep children
and pets clear from the Air250 Seated Leg Curl at all times,
especially while in use. Cleaning and user maintenance shall
not be performed by children.
11. The Air250 Seated Leg Curl can be used by children age 14
years and above. Persons with mental disabilities, reduced
physical, mental, or sensory capabilities, or lack of experience
or knowledge should not use the Air250 Seated Leg Curl
without constant supervision by a spotter/supervisor.
12. Proper warm-up required to help prevent injury. This Air250
Seated Leg Curl should only be used with proper instructions.
Always maintain good form and control during exercise.
If you feel pain or are unable to maintain good form, stop
immediately. Failure to follow these instructions could result
in injury.
13. Always keep legs on Leg Cushion (Exercise Arm) during
exercise. The sudden release of the Exercise Arm during
exercise will cause the Exercise Arm to recoil uncontrollably
and could result in serious injury or property damage. Bring
the Exercise Arm to the start position and disengage the
Adjustable Leg Cushion to safely exit the equipment. If at
any time you are not able to control your legs during
exercise, push the left (“-”)Thumb Button to reduce
the resistance.
IMPORTANT SAFETY INFORMATION
14. Never perform Power Test without a proper warm-up. This
high resistance/high-speed test should only be performed
with proper instructions (see page 14 “Power Test” for
complete instruction). Always maintain good form and
control during the test. If you feel pain or are unable to
maintain good form, stop immediately. Failure to follow
these instructions could result in injury.
15. Never make adjustments to the machine during exercise.
Always return the Exercise Arm to the start position before
making any adjustments to help prevent injury.
16. The highest level of safety can only be ensured if the
equipment is regularly inspected for damage and wear.
Always check the equipment before use for proper function
and any damaged, worn, or broken parts. Immediately
replace damaged, worn, or broken parts. Do not use the
Air250 Seated Leg Curl until all repairs have been completed
and tested by a Keiser-certied technician.
17. Use only replacement parts supplied/recommended
by Keiser Corporation. Attempting to repair or replace
any damaged, worn, or broken parts on your own is not
recommended. A Keiser-certied technician should be
consulted.
18. The use of any exercise equipment, including, without
limitation, Keiser’s strength training equipment in which
resistance can be changed at any time during the repetition,
without proper instruction and supervision violates the
terms of the agreement for the purchase of such products.
The ability to add resistance anytime during a repetition,
including, without limitation, the ability to do a heavy
negative may be dangerous, especially for anyone that
does not recognize or respect the potential danger.
19. Users, agents, and/or anyone directing the use of the Air250
Seated Leg Curl shall determine the suitability of the Air250
Seated Leg Curl for its intended use, and said parties are
specically put on notice that they shall assume all risk and
liability in connection herewith.
20. If you do not understand these instructions or have doubts
about the safety of the installation, assembly, or use of this
product, contact Keiser Customer Support:
1 559 256 8000
[e-mail]
keiser.com/support
Telephone and Live Chat
Monday—Friday 9 am to 5 pm PST

05
AIR250 SEATED LEG CURL
OPERATION MANUAL
CONVENTIONS USED CONVENTIONS USED
This Operation Manual contains the following marks:
WARNING: Indicates a hazardous situation that, if not
avoided, could result in death or serious injury.
CAUTION: Indicates a hazardous situation that, if not
avoided, could result in minor or moderate injury.
IMPORTANT: Indicates information considered critical,
but not hazard-related.
IMPORTANT SAFETY INFORMATION (CONTINUED)
Maintain and do not remove safety or notication labels for any reason. They contain important information. If unreadable
or missing, contact Keiser Corporation for a replacement (see back cover for contact information).
SAFETY AND NOTIFICATION LABELS
SEATSEAT LEGLEG ROMROM ROMROM
A B C D
E
F
G
H I J
MODEL 1221 MODEL 1222
A A
B B
D D
G
F
H
CC
I J
EE
EE
0012XXXX
888888-88888

06
AIR250 SEATED LEG CURL
OPERATION MANUAL
TECHNICAL SPECIFICATIONS
Figure 2. Air250 Seated Leg Curl Equipment Specications
46 inches
(1,168 mm)
45 inches
(1,143 mm) 58 inches
(1,473 mm)
196 lbs
(89 kg)
MODEL 1221
MODEL 1222
232 lbs
(105 kg)
EQUIPMENT SPECIFICATIONS
TECHNICAL DATA
See Figure 2 for Air250 Seated Leg Curl dimensions and weight.
1221 & 1222 Models specications:
• Resistance Range 0 – 260 lbs (0 – 118 kg),
change resistance in 1 lb/kg increments
• Adjustable Seat Back, Leg Cushion, and
Thigh Cushion.
• 0° – 135° Range of Motion
• Maximum user weight limit:
441 lbs (200 kg)
Range of Motion Limiter specications
1222 Model:
• START positions
0° – 100°, change in 10° increments
• STOP positions (degrees of exion)
10° – 120°, change in 10° increments
(Max at 135°)
Model 1222 Air250 Seated Leg Curl with Range of Motion Limiter shown
Model 1221 Air250 Seated Leg Curl has same dimensions
AIR STORAGE TANK
The equipment contains an air storage tank (air accumulator) with the following operating parameters:
POWER
• 1.5V D Alkaline Batteries (quantity 2, Keiser PN 966500)
• 3V CR2032 Lithium Coin Cell Battery (quantity 1)
Permanently attached, not serviceable. Contact Keiser Customer Support for service.
KEISER CHIP SYSTEM
• The eChip insertion slot receives the Keiser eChip (electronic memory chip) for data transfer and storage
Maximum working pressure: 125 psi (8.6 bar)
Maximum working temperature: 104ºF (40ºC)
Minimum working temperature: 32ºF (0ºC)
Maximum vessel capacity: 140 in3 (2.29 L)

07
AIR250 SEATED LEG CURL
OPERATION MANUAL
INSTALLATION AND PLACEMENT
TRAINING SPACE
Figure 4. Training Space for the 1221 & 1222 Air250 Seated Leg Curl
The equipment footprint is 58 inches x 45 inches (1,473 mm x 1,143 mm). The minimum recommended free space around the
equipment is 24 inches (610 mm) for the front and sides, and 6 inches (153 mm) for the rear.
Figure 3. How to Connect the Equipment to
the Keiser Air Supply
Note: Additional Free Space may be required to accommodate mobility device access.
No assembly required. Place the Air250 Seated Leg Curl on a at, level surface. Make sure the base of the frame makes
full contact with the oor. If gaps are present, relocate the equipment to an even surface.
CONNECT THE EQUIPMENT TO THE KEISER AIR
SYSTEM
WARNING: Never connect equipment to an air
source capable of exceeding 120 psi / 8.27 bar.
Over pressurizing Keiser pneumatic equipment may
cause tubing to burst, breakage of equipment,
abnormal operation, or serious injury. Use only clean,
dry, regulated compressed air at the rated pressure
range of 100–120 psi / 6.89–8.27 bar.
1. Plug the Compressor into the appropriate power
source to power the Compressor ON (allow the
Compressor to build up to a minimum of 100 psi /
6.89 bar; Keiser Compressor and Keiser Air System
not included, sold separately).
2. Connect the 1/4-inch Quick Disconnect (QD)
from the equipment into the Keiser Air Supply
(see Figure 3).
FREE AREA
FOOTPRINT
24 inches
(610 mm)
24 inches
(610 mm)
24 inches
(610 mm)
6 inches
(153 mm)
45 inches
(1,143 mm) 58 inches
(1,473 mm)
Keiser Air System
(oor or wall air outlet)
Direct-connect to
Keiser Small Air Compressor
Keiser
Large Air Compressor
Keiser
Small Air Compressor
1/4-inch QD

08
AIR250 SEATED LEG CURL
OPERATION MANUAL
EQUIPMENT OVERVIEW
6
OPERATION
Figure 5. Air250 Seated Leg Curl
5
4
3
2
1
7
8
12
16
11
17 131415
9
Power Display
START Plunger Knob
Cylinder Thigh Cushion
Locking Pin (Leg Cushion)
STOP Lock Knob
eChip
Belt Increase/Decrease (+/-) Thumb Buttons
Instruction Placard (not shown)
Exercise Arm
Seat Back
Seat
Anti-Slip Step
Leg Cushion Spring Pin
Processor Box
Air Tank
Quick Disconnect (QD) with Tube
Seat Lever
RANGE OF MOTION (ROM) LIMITER*
1
A
5
2
B
6
3
7
4
8
9
16
12
17
18
13
14
15
10
11
10
ROM
A
B
Range of Motion (ROM) Limiter
Model 1222
*Model 1222 with Range of Motion (ROM) Limiter shown. ROM Limiter not included on the 1221 model.

09
AIR250 SEATED LEG CURL
OPERATION MANUAL
POWER DISPLAY
Figure 6. Power Display Overview
When using the eChip, ensure that it is
fully inserted into the slot as shown.
6
1
3
2
4 5
8
7
SEATSEAT LEGLEG ROMROM ROMROM
Rate monitoring systems may be inaccurate. Over
exercising may result in serious injury or death. If
you feel faint stop exercising immediately.
“Peak Power” not suitable for use in applications
where the health and safety of a patient may be
dependent on the accuracy of those parameters.
Use of the exercise Target program requires medical
supervision and compliance with exercise testing
guidelines.
CAUTION

10
AIR250 SEATED LEG CURL
OPERATION MANUAL
LINE 1 - RESISTANCE
The Resistance window displays the current resistance or OFF. Adjust the resistance using the (+/-) Thumb Buttons located
on top of the Thigh Cushion. When the window displays OFF, the machine enters a low power consumption sleep mode to
increase battery life. Normal operation may be resumed by pressing either Thumb Button or by inserting the eChip. If this
window displays the low battery signal (“Lo-bA”), the batteries are getting weak and should be replaced soon (D batteries,
quantity 2; refer to page 16 “Battery Replacement” for complete instructions).
LINE 2 - SET OR REPETITIONS
This window displays the current repetition count except immediately after an eChip is rst inserted, in which case it displays
the current set. The set count may range from 1 to 9 and is signaled by the appearance of three horizontal bars in the left
digit. The number of sets is dened as the number of sets of exercises performed in a four-hour period. Once four hours have
passed, the machine assumes that the user is returning for a new visit. The repetition count may range from 0 to 99. The
repetition count may be reset by momentarily pressing both increase and decrease (+/-)Thumb Buttons simultaneously. In
Power Test mode, the window will display the repetition count per test section (refer to page 14 “Power Test” for complete
instructions).
LINE 3- TARGET REPS
The Target Reps window displays the number of repetitions performed on the corresponding set of the previous visit, if that
set was a normal workout set and an eChip is inserted. If the corresponding set of the previous visit was a Power Test, the
display will show “Pr.” When in Power Test mode, the window will display “P1” during the low resistance test set and “P2”
during the high resistance test set (refer to page 14 “Power Test” for complete instructions).
LINE 4 - CURRENT POWER / PERCENT OF PEAK POWER
The Current Power window can display 4 different values. During an exercise set, it displays the percent of peak power
achieved for the most recent repetition. At the end of a Power Test, this window displays the resistance to use to achieve
maximum power. When an eChip is inserted and the previous corresponding set was a normal workout set, it displays the
resistance used for that set. When an eChip is inserted, and the previous corresponding set was a Power Test, it displays the
resistance to use to achieve maximum power. When the calculated resistance to achieve maximum power is being displayed,
it ashes. In summary, during an exercise set, this window displays the power for the current rep, at the end of a Power
Test it is the resistance to use for training at maximum power; when an eChip is inserted it is the resistance to set into the
window above before exercising.
LINE 5 - PEAK POWER
The Peak Power window displays the highest power that has occurred during this workout or since the data was last reset.
LINE 6 - MACHINE ADJUSTMENT
When using the eChip, Seat and Leg positions (including ROM settings, 1222 model only) can be tracked and recorded. Press
the arrows located directly above/below each window to input settings.
SEAT: Fore / aft position of the Seat Back (16 position settings).
LEG: Position settings 1 – 8 of the Leg Cushion.
ROM (1222 model only): START settings 1 – 9, 0, or A (START ROM window located to the right of the LEG window). STOP
settings 1 – 9, 0, A, C, or E (STOP ROM window located to the right of the START ROM window).
NOTE: The adjustments may only be changed immediately after the eChip is inserted and before the third repetition has
occurred. Once three repetitions are performed, the machine adjustments cannot be changed until the eChip has been
removed and reinserted. Machine adjustments apply to a machine and cannot be changed from set to set.
LINE 7 - eCHIP READER
The eChip Reader, located at the bottom right of the Power Display, receives and reads your eChip data.
LINE 8 - eCHIP
The eChip collects workout data and can store up to 24 separate equipment models (up to 4 equipment position settings per
model) and up to 240 separate workout sets across Keiser Air and Innity Series. Designed as an electronic replacement for
the hand-written exercise card, the eChip enables recall and set-up of the exercise equipment upon the next workout. The
Keiser eChip software allows saved eChip data to be viewed, stored, and exported (.csv le format) for analysis.
NOTE: Three user eChips (red color) come standard with your Air250 Seated Leg Curl. The Keiser USB Power Kit (a USB adapter
to transfer data from your eChip to your computer and Time Set eChips to set the time zone/time on your Air250 Seated Leg
Curl) is available. For parts order, contact Keiser Customer Support (see back cover for contact information).
Keiser eChip software system requirements, download, and user manual available at keiser.com/support (search: eChip).
DISPLAY FEATURES

11
AIR250 SEATED LEG CURL
OPERATION MANUAL
PROPER OPERATION CHECK
Check equipment condition and function before every workout:
Immediately replace damaged, worn, or broken parts. Do not use the Air250 Seated Leg Curl until all repairs have been
completed and tested by a Keiser-certied technician.
* “Lo-bA” = Batteries are low, replace immediately. If batteries are dead (depleted), the Power Display remains blank (see
Battery Replacement procedure, page 16).
A. Adjustments — Engage and function properly:
• Locking Pin (Leg Cushion)
• Spring Pin (Thigh Cushion)
• Seat Lever
• Plunger Knob and Lock Knob (ROM Limiter, if
equipped)
B. Thumb Buttons and Display — press Thumb Buttons
to check for proper “+ / -” operation and the Display
powers on*.
C. Upholstery — Seat, Seat Back, Thigh, and Leg Cushions
have no excessive wear and are free of rips or tears.
D. Exercise Arm and Thigh Cushion — Move freely;
no loose parts in the linkage or lock mechanism, no
excessive wear on any rubber stops.
E. Air Leaks — No air leaks audible in the system.
F. Stability — equipment is level to a solid, at surface.
Figure 7. Proper Operation Check Illustration
C
F
B
AADJUSTMENTS
Locking Pin
Spring PinSeat Lever
Lock Knob
(ROM STOP)
Plunger Knob
(ROM START)
E
D

12
AIR250 SEATED LEG CURL
OPERATION MANUAL
HOW TO USE THE AIR250 SEATED LEG CURL
1. Pull the Seat Back forward, or lift the lever to move backward, so your knees align with the machine pivot point.
2. Adjust the Leg Cushion to t above your heel; turn the Locking Pin counter-clockwise to loosen, counter-clockwise to
set the position.
3. Pull the Spring Pin to release the Thigh Cushion. Push the Thigh Cushion down so that it ts snugly against your thighs.
4. Adjust the resistance with the Thumb Buttons.
5. Upon completion, push down on the Thigh Cushion, pull the Spring Pin, and return the Thigh Cushion to the original position.
1
2
3
4
5
Figure 8. How to Use the Air250 Seated Leg Curl
1221, 1222 MODELS
EXERCISEADJUST
Pivot Point
Seat Lever
(left-hand side)
Seat Back
CAUTION
• Consult your physician before beginning any exercise
program.
• This equipment should only be used with proper
instructions.
• Proper warm-up required to help prevent serious injury.
• Always maintain good form and control during exercise.
• If you feel pain, faintness, or are unable to maintain
good form, stop immediately.
• Use caution when increasing/decreasing resistance
during exercise.
• Never make adjustments to the machine during
exercise. Failure to do so could result in serious injury.
CONCENTRIC PHASE (DOWNWARD MOVEMENT)
• Bend at the knees as you curl your legs down toward
your thighs.
• Keep your body stationary and your back supported
by the Seat Back.
ECCENTRIC PHASE (UPWARD MOVEMENT)
• Return the Exercise Arm to the start position in a smooth,
controlled manner (slower speed recommended).
• Maintain control of the load; keep the Exercise Arm
off the stops throughout the exercise.
BREATHING
• Exhale during the concentric phase (downward movement).
• Inhale during the eccentric phase (upward movement).
TRAINING TIPS
• Maintain the natural curvature of your spine.
• Avoid rocking your body to create momentum when
moving heavy loads.
• Hold the Handgrips for stability during movement.
Figure 9. Air250 Seated Leg Curl Target Muscles
HAMSTRINGS
Locking Pin
Leg Cushion
Spring Pin
Thigh Cushion

13
AIR250 SEATED LEG CURL
OPERATION MANUAL
HOW TO USE THE ROM LIMITER
Set the START position:
1. Hold the Exercise Arm with one hand, and with your
other hand pull and hold the Plunger Knob to disengage.
2. Move the Exercise Arm to the desired starting position.
3. Release the Plunger Knob to lock the Exercise Arm
into position.
1
2
3
Set the STOP position:
1. Remove the Lock Knob (turn counter-clockwise).
2. Move the Lock Knob to the desired stop position.
3. Tighten the Lock Knob (turn clockwise) until snug.
1
2
3
1222 MODEL
Set the range of motion START and STOP points for a targeted workout.
Figure 10. How to Set the ROM START Position Figure 11. How to Set the ROM STOP Position
Position Setting
2
3
Plunger Knob
11
3
2
Position Setting
Lock Knob
START positions
0° – 100°, change in 10° increments
STOP positions (degrees of exion)
10° – 120°, change in 10° increments
(Max at 135°)
Exercise Arm

14
AIR250 SEATED LEG CURL
OPERATION MANUAL
POWER TEST
TEST PROTOCOL — The Power Test (KEISER Six-Rep Test) is used to determine the resistance at which you achieve
MAXIMUM POWER. The test consists of two sets:
Perform all repetitions at the highest possible speed at the given resistance; speed is essential in power output.
Note: The Power Test may be performed with or without an eChip. Follow the Power Test instructions below:
Three repetitions
Low resistance, high speed
10% of your maximum
Three repetitions
High resistance, high speed
80-90% of your maximum
SET
2
SET
1
CAUTION
• Test should only be performed with proper instruction.
• Never perform Power Test without proper warm-up.
• Always maintain good form and control throughout test.
• Rate monitoring systems may be inaccurate. Over exercising
may result in serious injury or death. If you feel faint stop
exercising immediately.
• “Current Power,” “Peak Power,” and “Percent of Peak
Power” are not suitable for use in applications where the
health and safety of a patient may be dependent on the
accuracy of those parameters.
• The use of any exercise program requires medical
consultation and compliance with exercise testing guidelines.
START TEST: Press and hold both
Thumb Buttons until “6 r” (Test
Mode) displays in the RESISTANCE
window, then release the Thumb
Buttons. NOTE: TARGET REPS window
displays “P1” (Power Test Set 1).
SET RESISTANCE, LOW LEVEL
Set the resistance to 10% of your
maximum.
POWER TEST, SET 1 (P1)
Do one repetition at maximum
speed. Pause 10 seconds.
Repeat two more times.
1
4
2
5
3
6
SET RESISTANCE, HIGH LEVEL
Increase the resistance to a high
level (80-90% of your maximum).
NOTE: TARGET REPS window displays
“P2” (Power Test Set 2).
POWER TEST, SET 2 (P2)
Do one repetition at maximum
speed. Pause 10 seconds.
Repeat 2 more times.
TEST COMPLETE
The ashing number is your
Resistance setting for Maximum
Power.
TROUBLESHOOT: “ Er ” numbers 1 – 4 displayed in the CURRENT POWER window indicates not enough difference in resistance
between the low and high sets. Try again with a greater difference in resistance between the low and high sets. To restart the
Power Test, (a) reinsert eChip, if the eChip is being used, or (b) begin at Step 1 to repeat the procedure.
To exit Power Test or resume exercise,
press both Thumb Buttons until “CLEr”
is displayed or remove eChip.
You can adjust and test your resistance
setting between the rst and second rep.
The rep count will reset to 1.
You can adjust and test your resistance
setting between the rst and second rep.
The rep count will reset to 1.

15
AIR250 SEATED LEG CURL
OPERATION MANUAL
MAINTENANCE
PREVENTATIVE MAINTENANCE SCHEDULE
Daily
• Check for safe and proper function of the equipment (perform “Proper Operation
Check,” page 11).
• Clean the chrome and paint where applicable.
• Wipe down the equipment with a clean cloth. If necessary, use water and mild soap
(neutral, non-caustic). Target areas that come in contact with sweat. Wipe dry the
equipment.
Monthly
• Check externally visible screws are fastened properly with no looseness.
• Clean and lubricate the Cylinder Rod.
• Inspect Air Line for kinks, tears, or breaks.
• Inspect Frame for any weakening in weld areas, and other connected areas.
Quarterly
• Lubricate Pivot Bushings.
• Inspect Exhaust Mufer and Air Filter for discoloration; replace if necessary.
• Verify compressor(s) cycle on/off between 100-120 psi (6.89–8.27 bar).
Annually and
other Required
Maintenance
• For complete instructions, see page 17 “Annual Maintenance.”
• Battery Replacement. The low battery signal (“Lo-bA”) will appear on the Power Display
when it is time to replace the batteries. Refer to page 16 “Battery Replacement”for
complete instructions.
NOTE: Your Keiser Air Compressor (not included with your Air250 Seated Leg Curl) requires
basic annual maintenance. Contact Keiser Customer Support for Air Compressor operator
manual or download at keiser.com/support (search: Air Compressor manuals).
Weekly
• Check parts most susceptible to wear are not damaged or broken:
– Upholstery, Adjustment Knobs, Rubber Stops (red bumpers), Belt, Pulley, Thumb
Buttons, and Hand Grips.
• Wax chrome and paint where applicable; wax upholstery.
• Clean Hand Grips.
• Inspect Air Line Filter.
Contact Keiser Customer Support for replacement parts order, or for any matters regarding the safe operation of your
Air250 Seated Leg Curl (see back cover for contact information).
IMPORTANT: Do not use household or industrial cleaners as they contain caustic chemicals that can destroy the paint nish
and cause corrosion. Use only mild soap/detergent (neutral, non-caustic) to clean.
CAUTION: SERVICE AND REPAIR SHALL ONLY BE PERFORMED BY KEISER-CERTIFIED TECHNICIANS.
Failure to follow these instructions can result in serious injury.
CAUTION: THE HIGHEST LEVEL OF EQUIPMENT SAFETY CAN ONLY BE ENSURED IF THE EQUIPMENT IS
REGULARLY INSPECTED FOR DAMAGE AND WEAR. Immediately replace damaged, worn, or broken parts. Do
not use the Air250 Seated Leg Curl until all repairs have been completed and tested by a Keiser-certied technician.

16
AIR250 SEATED LEG CURL
OPERATION MANUAL
Do not operate the equipment during battery replacement procedure. “Lo-bA” = Batteries are low, replace immediately.
NOTE: If batteries are dead (depleted), the Power Display remains blank. To replace the batteries, refer to Figure 12 and
follow the instructions below (no tools required).
When the batteries are replaced, the Power Display will run through a test sequence (you will see a series of numbers
ashing). Once the test sequence stops and the Power Display shows "OFF," the Air250 Seated Leg Curl is ready for use.
BATTERY REPLACEMENT
1. Unscrew the Brass Nut on the Processor Box.
Pull and remove the cover.
2. Remove the 2 D batteries by carefully pulling
out the Battery Sleeve (follow manufacturer’s
recommendations for handling, maintaining,
and disposing of batteries).
3. Observe the correct polarity position (see +/-
marking inside the battery compartment),
insert the 2 new D batteries into the battery
sleeve and install.
4. Replace the Processor Box cover and screw
the Brass Nut nger tight.
Do not dispose of batteries in a re. The
batteries may explode.
Do not open or mutilate batteries. They
contain an electrolyte which is toxic and
harmful to the skin and eyes.
Replace batteries with the same number
and type of batteries as originally installed
in the equipment.
Recycle batteries in accordance with local
recycling procedures.
CAUTION
Figure 12. Battery Replacement
Brass Nut
Processor
Box Cover
Batteries and
Sleeve

17
AIR250 SEATED LEG CURL
OPERATION MANUAL
The following routine maintenance is recommended annually or at the time batteries are replaced:
1. Clean:
• Wipe any accumulated dust around the Frame and the Belt System, including the Air Tank and Cylinder, using
a clean shop cloth.
2. Visual inspection of Air Lines and Communication Wires:
• Air Lines have no kinks, tears, or breaks; Communication Wires have no exposed wires or visible damage.
3. Replace the Air Filter if element is dirty (element turns a bright pink or red color):
• Tools required: Small Needle Nose Pliers, Cutter Tool (to cut off ared end of tubes).
4. Visual inspection of Belt and Pulley:
• Belt is free of cracks, frayed edges, or otherwise excessive wear; check for smooth travel around the Pulley.
5. Replace the Mufer if discoloration is present.
• Tool required: 11/16 inch Wrench or Adjustable Wrench.
6. Lubricate Cylinder Rod:
• Wipe the Cylinder Rod clean and coat lightly with clean, SAE 30 motor oil, or with a silicon-based spray.
7. Visual inspection of Adjustment Knobs and moving components:
• Adjustment Knobs engage and function properly. Check Exercise Arm, Thigh Cushion, Set Back, and ROM Limiter
(if equipped) are fully functional; all externally visible nuts and bolts are tightened properly.
1
2
3
4
5
6
7
Figure 13. Annual Routine Maintenance Illustration
Contact Keiser Customer Support for replacement part(s) order, or for any matters regarding the safe operation of your
Air250 Seated Leg Curl (see back cover for contact information).
ANNUAL MAINTENANCE
WARNING: HIGH-PRESSURE AIR.
DISCONNECT THE EQUIPMENT FROM
THE AIR SUPPLY AND RELEASE ALL
THE AIR IN THE EQUIPMENT (“—” THUMB
BUTTON) BEFORE PERFORMING ROUTINE
MAINTENANCE.
31
2
7
5
4
6

18
AIR250 SEATED LEG CURL
OPERATION MANUAL
SAFETY NOTIFICATIONS
TYPE/DEGREE OF PROTECTION CLASSIFICATION/IDENTIFICATION/WARNINGS SYMBOL
The degree of protection against
electric shock
Device is powered by two D cell alkaline batteries.
Electrical safety evaluation conducted by TÜV SÜD per
IEC/EN 60601-1 requirement.
The degree of protection against the
ingress of liquids
Not protected N/A
The degree of safety in the presence
of a ammable anesthetic mixture with
air or with oxygen or nitrous oxide
Not suitable N/A
The mode of operation Continuous N/A
Information regarding potential
electromagnetic or other interference
and advice regarding avoidance
The Air250 Seated Leg Curl use electromagnetic and RF
energy only for its internal function. Therefore, its EMC and
RF emissions are very low and are not likely to cause any
interference in nearby electronic equipment.
N/A
EMC Notices, Statement of Compliance See Electromagnetic Compatibility (EMC) section, page 19. N/A
ID of specied optional external power
supplies or battery chargers
The Air250 Seated Leg Curl does not require an external
power supply.
N/A
ID of any risks associated with the
disposal of waste products, residues,
including disposal of the equipment
itself at the end of its useful life.
The Air250 Seated Leg Curl contains electronic circuit
assemblies, 2 alkaline D cell batteries, and a sealed lithium
coin cell battery that may require compliance with specic
local disposal or recycling procedures.
The specication of the environmental
conditions of transport and storage
Use indoor in climate-controlled environment only.
Keep away from areas of extreme humidity.
NOTICE: Equipment not tested at extreme high/low
temperatures.
N/A
REGULATORY AND COMPLIANCE NOTICES
Standards ISO/EN 20957-1 Accuracy Class A (High accuracy) and Usage Class S (Studio,
commercial use); IEC/EN 60601-1 and IEC/EN 60601-1-2.
Marks
Displayed watts testing parameters: “Current Power,” “Peak Power,” and “Percent of Peak Power” are not suitable
for use in applications where the health and safety of a patient may be dependent on the accuracy of those parameters.
Clinical Settings Note: In clinical settings, patients may operate this equipment in accordance with this user manual
and the instructions and guidance provided by the healthcare personnel responsible for supervising their treatment
and care. However, patients shall not perform preventive maintenance, repairs or replace batteries on equipment
installed in clinical facilities.

19
AIR250 SEATED LEG CURL
OPERATION MANUAL
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
— Reorient or relocate the receiving antenna.
— Increase the separation between the equipment and receiver.
— Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
— Consult the dealer or an experienced radio/TV technician for help.
US FCC COMPLIANCE STATEMENT
DISPOSAL
ELECTROMAGNETIC COMPATIBILITY (EMC)
DISPOSAL
This equipment contains electrical or electronic components, alkaline batteries, and a sealed lithium coin cell
battery that must be disposed of properly to comply with the EU Directive on disposal of waste electrical and
electronic equipment (EU WEEE Directive 2002/96/EC).
Contact an appropriate waste disposal company upon the equipment’s end of service life. Disposal must be in accordance
with respective national regulation.
Wear parts: After being replaced, wear parts must be disposed of according to country-specic waste laws.
If you have any questions about equipment disposal, please contact your local dealer or Keiser Customer Support (see
back cover for contact information).
EMC Notices — Statement of Compliance
This product has been determined to be compliant with the applicable standards, regulations, and directives for the countries
where the product is marketed.
Compliance documentation, such as Declaration of Compliance for the product, are available upon request by contacting
[e-mail]. Please include the product, model number identiers, and serial number and country that compliance
information is needed in request.
Korea
“This equipment is for home use and has acquired electromagnetic
conformity registration, so it can be used not only in residential
areas but also other areas.”

KEISER CORPORATION
2470 S. Cherry Ave.
Fresno, CA 93706
CUSTOMER SUPPORT
If you have any questions regarding the operation of the
A250 Seated Leg Curl after reading this manual, contact
Keiser Customer Support:
125501_B
1 559 256 8000
[e-mail]
keiser.com/support
20
AIR250 SEATED LEG CURL
OPERATION MANUAL
Telephone and Live Chat
Monday—Friday 9 am to 5 pm PST
WARRANTY STATEMENT
View or print your Air250 Seated Leg Curl warranty online at keiser.com/support/warranty.
If you have any questions about your warranty, please contact Keiser Customer Support at 1 559 256 8000 and via live
chat at keiser.com/support (Monday—Friday, 9 am to 5 pm Pacic Time), or by email at [e-mail].
Customers outside the United States may obtain warranty information directly through a Keiser international distributor
or dealer in the country of installation, or direct from Keiser’s international division.
European Authorized Representative
KEISER EUROPE SP. Z O.O.
ul. Starodworska 1
Gdańsk 80-137
Polska
UK Responsible Person (UKRP)
KEISER UK Ltd.
Unit 3, Hampton Industrial Estate
Hampton St., Tetbury
Gloucestershire, GL8 8LD
United Kingdom